PurposeThe paper aims to gain understanding of perceived benefits and barriers to GAS-light as an occupational therapy outcome measure in community adult mental health. The study explored occupational therapists’ views on the client-centred nature of GAS-light and whether it is an applicable outcome measure for group intervention. It also aimed to understand how occupational therapists use of GAS-light informed their practice and the wider multidisciplinary team perspective.Design/methodology/approachThe study used a phenomenological design. This comprising of a focus group of occupational therapists experienced in using the tool, followed by framework analysis. Focus group questions were derived from literature.FindingsThree main themes were identified to reflect experiences relating to the GAS-light tool as an outcome measure; value in process, occupational narrative and language and expertise.Practical implicationsThe paper is indicative of practical implications regarding the use of the GAS-light tool with community mental health clients and therapists, including the perceived value in the process, the language used by the therapist and level of expertise.Originality/valueThis paper fulfils an identified need to contribute towards an evidence base for occupational therapy and mental health.